Patents by Inventor Takayuki Toshima
Takayuki Toshima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6503003Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.Type: GrantFiled: March 26, 2001Date of Patent: January 7, 2003Assignee: Tokyo Electron LimitedInventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
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Publication number: 20020185225Abstract: After semiconductor wafers W have been processed with ozone gas and steam fed into a processing vessel 10, air is fed into the processing vessel 10 from an air supply source connected to an ozone gas supply pipe 42 for feeding ozone gas into the processing vessel 10, whereby an atmosphere of the ozone gas in the processing vessel 10 is replaced with an atmosphere of the air.Type: ApplicationFiled: May 28, 2002Publication date: December 12, 2002Applicant: TOKYO ELECTRON LIMITEDInventors: Takayuki Toshima, Naoki Shindo, Tadashi Iino
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Patent number: 6491452Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.Type: GrantFiled: April 11, 2001Date of Patent: December 10, 2002Assignee: Tokyo Electron LimitedInventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
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Publication number: 20020155709Abstract: While supplying DHF as a chemical liquid to wafers W each having a resist pattern formed on the surface, oxidation films on the wafers W are eliminated by etching and successively, the surfaces of the wafers W are cleaned by supplying the wafers W with a rinsing liquid. Subsequently, by supplying an ozone water of a predetermined concentration, oxidation films are formed on the wafers W in order to make their surfaces hydrophilic. Then, N2-gas (dry gas) is supplied to the wafers W in order to remove moisture adhering to the surfaces of the wafers W. In this way, it is possible to prevent an occurrence of water-marks on the wafers W without collapsing the resist patterns formed on the wafers W, allowing both quality and yield rate of the wafers to be improved.Type: ApplicationFiled: October 19, 2001Publication date: October 24, 2002Applicant: TOKYO ELECTRON LIMITEDInventors: Takayuki Toshima, Miyako Yamasaka
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Publication number: 20020122670Abstract: A solution having a photosensitive radical is applied onto a resist film, a developing solution is applied thereonto, and the entire surface of the solution having the photosensitive radical is exposed all at once. Developing of the resist film progresses all at once after a coating film of the solution having the photosensitive radical dissolves in the developing solution, and hence time difference in the start time of developing does not occur in the surface of a substrate, thereby enabling uniform developing and an improvement in line width uniformity (CD value uniformity) in the surface of the substrate.Type: ApplicationFiled: March 29, 2002Publication date: September 5, 2002Inventors: Takayuki Toshima, Tsutae Omori, Yoshio Kimura
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Publication number: 20020096196Abstract: A substrate processing apparatus 8 for feeding a processing liquid and processing a substrate W with the processing liquid comprises holding member 22 for holding the substrate W, and a lower side member 42 which is moved relatively with respect to the back surface of the substrate W held by the holding member 22 between a processing position A near the substrate undersurface and a retreat position B remote from the substrate undersurface. The processing liquid is fed between a gap between the lower side member 42 moved to the processing position A and the back surface of the substrate held by the holding member 22, and the substrate undersurface is processed.Type: ApplicationFiled: January 23, 2002Publication date: July 25, 2002Inventors: Takayuki Toshima, Takehiko Orii
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Patent number: 6398429Abstract: A solution having a photosensitive radical is applied onto a resist film, a developing solution is applied thereonto, and the entire surface of the solution having the photosensitive radical is exposed all at once. Developing of the resist film progresses all at once after a coating film of the solution having the photosensitive radical dissolves in the developing solution, and hence time difference in the start time of developing does not occur in the surface of a substrate, thereby enabling uniform developing and an improvement in line width uniformity (CD value uniformity) in the surface of the substrate.Type: GrantFiled: March 13, 2000Date of Patent: June 4, 2002Assignee: Tokyo Electron LimitedInventors: Takayuki Toshima, Tsutae Omori, Yoshio Kimura
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Publication number: 20020045008Abstract: Resists can be removed while metal contamination of wafers, etc. and generation of particles, and growth of oxide films are suppressed.Type: ApplicationFiled: October 3, 2001Publication date: April 18, 2002Applicant: TOKYO ELECTRON LIMITEDInventors: Takayuki Toshima, Naoki Shindo, Tadashi Iino
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Publication number: 20020037371Abstract: The wafers W are dipped and rinsed in pure water in the processing bath 60, and then dichloromethane is fed into the processing bath 60, thereby changing the state of the wafer W from being dipped in pure water to being dipped in dichloromethane. Thereafter, the wafers W is raised up to the drying chamber 61, and dichloromethane remained on the surface of each wafer W is evaporated, and the hot N2 gas is discharged onto the wafers W. Thereby, no water marks are produced, and no resist is dissolved, and the substrate can be dried in safety.Type: ApplicationFiled: May 15, 2001Publication date: March 28, 2002Inventors: Yoshio Kumagai, Takayuki Toshima
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Publication number: 20010032396Abstract: The present invention provides a substrate processing apparatus and method which can prevent accidents in advance so as to ensure safety against interruption of operations of the apparatus and leakage of processing substances. In a substrate processing method in which wafers W are processed are processed by feeding an ozone gas 5 to the wafers W loaded in a processing vessel 2 while an interior atmosphere in the processing vessel is being exhausted to be passed through an ozone killer 10, the ozone gas 5is fed under the conditions that the processing vessel 2 is tightly closed, and the ozone killer in its normal state. When the processing is interrupted, an interior atmosphere in the processing vessel 2 is forcedly exhausted. When the gas leaks, the interior atmosphere and a peripheral atmosphere of the processing vessel 2 are forcedly exhausted while the feed of the ozone gas 5 is paused.Type: ApplicationFiled: April 20, 2001Publication date: October 25, 2001Inventors: Takayuki Toshima, Tadashi Iino
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Publication number: 20010024767Abstract: On the occasion of developing processing, a mixed solution produced by stirring a developing solution and a solution with a specific gravity smaller than the developing solution is supplied to the front surface of a substrate and left as it is for a fixed period of time. After the mixed solution is separated into two layers of which the lower layer is the developing solution and the upper layer is the solution, developing progresses all at once in the entire surface of the substrate. Hence, time difference in start time of developing does not occur in the surface of the substrate, thereby enabling uniform developing and an improvement in line width uniformity of a resist pattern film in the surface of the substrate.Type: ApplicationFiled: March 9, 2001Publication date: September 27, 2001Applicant: TOKYO ELECTRON LIMITED TBS Broadcast CenterInventors: Takayuki Toshima, Takehiko Orii
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Publication number: 20010014224Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.Type: ApplicationFiled: March 26, 2001Publication date: August 16, 2001Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
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Publication number: 20010012456Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.Type: ApplicationFiled: April 11, 2001Publication date: August 9, 2001Inventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
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Publication number: 20010009135Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.Type: ApplicationFiled: March 26, 2001Publication date: July 26, 2001Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
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Patent number: 6257778Abstract: When the surface of a substrate is developed, a developing solution in low state of development function is supplied to the surface of the substrate. Thereafter, the development function of the supplied developing solution is improved. Thus, the surface of the substrate is developed. When the developing solution is supplied to the surface of the substrate, the developing solution does not develop the surface of the substrate. Thus, even if there is a time lag of the developing solution supplied on the surface, the surface of the substrate is equally developed.Type: GrantFiled: February 3, 1999Date of Patent: July 10, 2001Assignee: Tokyo Electron LimitedInventors: Takayuki Toshima, Nobuo Konishi
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Publication number: 20010004066Abstract: The present invention is a substrate processing method for etching a substrate having a wiring layer, an insulating layer, and a resist layer provided on the surface to form a contact hole in the insulating layer, and removing the resist layer and a polymer layer adhered to at least the surface of the contact hole from the substrate after etching. The substrate processing method includes a first step of making the surfaces 6 of the resist layer 3 and the polymer layer 5 existing on the substrate W hydrophilic. In a second step, the resist layer and polymer layer are removed by a processing liquid thereafter.Type: ApplicationFiled: December 15, 2000Publication date: June 21, 2001Applicant: TOKYO ELECTRON LIMITED OF JAPANInventors: Takayuki Toshima, Takehiko Orii
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Patent number: 6238848Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.Type: GrantFiled: March 31, 2000Date of Patent: May 29, 2001Assignee: Tokyo Electron LimitedInventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
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Patent number: 6228561Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.Type: GrantFiled: January 31, 1997Date of Patent: May 8, 2001Assignee: Tokyo Electron LimitedInventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
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Patent number: 6143478Abstract: A resist processing method includes (a), to a substrate having a circuit pattern with an uneven surface formed thereon, coating a photoresist solution to, by doing so, form a photoresist film, (b) subjecting the substrate to heat processing to cause a portion of the photoresist film to be chemically modified to create a modified resist layer of a substantially uniform thickness from the uneven surface of the circuit pattern, and (c) selectively removing only a resist portion unmodified at the step (b) to leave a modified resist layer on the uneven surface of the circuit pattern.Type: GrantFiled: May 19, 1998Date of Patent: November 7, 2000Assignee: Tokyo Electron LimitedInventors: Takayuki Toshima, Nobuo Konishi
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Patent number: 6097469Abstract: A method of forming a resist on a substrate and processing the resist in a resist processing system having a processing region and a non-processing region which are air-conditioned, the method comprising the steps of, transferring the substrate into the non-processing region, coating the resist on the substrate, exposing the coated resist, developing the exposed resist, subjecting the coated resist at least once, to heat treatment in a period from the transferring step to the developing step, detecting at least once, the concentration of an alkaline component which causes defective resolution of the resist in a processing atmosphere in a period from the transferring step to the developing step, setting a threshold value for the concentration of the alkaline component in the processing atmosphere which causes the defective resolution of the resist, and controlling and changing at least one processing atmosphere in the steps in accordance with a detected concentration of the alkaline component and the thresholdType: GrantFiled: March 29, 1999Date of Patent: August 1, 2000Assignee: Tokyo Electron LimitedInventors: Hidetami Yaegashi, Yasunori Kawakami, Jae Hoon Park, Keiko Kanzawa, Takayuki Katano, Takayuki Toshima, Yuji Kakazu